Last month singer Cody promised the pair have something truly "special" coming for their fans later on this year.

Even better… the blonde-haired charmer even dropped hints that the pair may even release an acoustic album or EP of some kind, in a brand new chat teasing their team-up plans.

(Picture: Instagram)

"Justin and I have been in the studio for two weeks or so working on something pretty cool," Cody revealed to Hollywood Life this week. "We're not really sure what it's going to be yet.

"But you'll hear something this year," Cody promised. "It might be a little more than a song."

(Picture: Instagram)

The Australian pop star went on to describe the pair's top-secret venture as a "real cool acoustic project".

"We've just been messing around [with the] guitars and just working on a bunch of music." Consider us VERY intrigued Mr Simpson!

Producer Andrew Wyatt added even MORE speculation into the mix with his latest comments, alongside a snap of the pair in action working on the project. Stop teasing us fellas… we want to HEAR it!

"The greatest way to hear a song is on an acoustic guitar, that's how you know if it is special or not," Andrew posted alongside the snap. "I think it's safe to say we made an album's worth of those… @justinbieber and @codysimpson have something next level here… onwards and upwards."

Could it be, Beliebers? A WHOLE album of Justin and Cody Simpson singing sweet, BEAUTIFUL music together? #FingersCrosssed